Malicious RTF — malware analysis report

Static analysis result for SHA-256 e33bd7fc7999be02…

MALICIOUS

RTF

60.6 KB
MD5: 63673ae6a6d03025b1fe6d61bddf784b SHA-1: 4bedafcf75026aa1db942442c74531c77e9dddb5 SHA-256: e33bd7fc7999be02ccfd897df3f0fb47e0986f2d56bca5e3ed6f0a97bf4d1f3f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution, which is the primary attack vector observed. No further stages or specific family indicators were identified.

Heuristics 4

  • CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
    Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000110.bin
d76d71403a040cff548e691607025ceb7c9465fd7c155a634a74d80c2f68496b		 rtf-objdata-decoded RTF \objdata at offset 0x110 3631 bytes

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